Robert rudolph graf



iltl'iili PdSlTIONd, tiddllhld 0h PtASTlC ROBERT RUDOLPH GRAF, OFBALTIMORE, MARYLAND, ASSIGNOR, BY DIRECT AND MEsNE ASSIGNMENTS,ToTHEiPHoENIX FIRE PRoo PAINT coM- PANY, OF. NEW YORK, N. Y.

FIREPROOF PAINT.

SPECIFICATION forming-part of Letters Patent No. 494,508, dated March28, 1893. Application f led December 13, 1892. Serial No. 455,074. ((Nospecimens.)

fire-proof paints and consists in the novel composition hereinafterfully set forth and claimed. v 1

In preparingmy composition, 1 use the following ingredients: tungstateof ammonia two parts; hyposulphite of ammonia five parts; sulphateot'isoda ten parts; caustic lime fifteen parts; chalk two parts; alumthree parts; and carbonate of soda five parts. These materials orsubstances are firmly pulverized and are commingled with a sufficientquantity of oil togive the consistency of, o rdinarypaint, anysuitablepigment being also added to give the required color.

While my invention isdesigned primarily as a paint it may also be usedfor rendering dress goods orother fabrics fire proof. In

this case, a suflicient quantity of water is ern- Witnesses:

ployed in place of the oil, which is dispensed 0 with, to give theproper consistency. The said fabrics are dipped in the solution andthoroughly impregnated or saturated therewith. They are thenremoved anddried, without wringing,'when they are ready for 35 ironing. Fabrics sotreated, are rendered almost absolutely fire-proof, as they will notburn undenthe highest temperature, but simply become charred orcarbonized.

Having thus described my invention, what 46 I claim is- 1 1. Afire-proof paint consisting of tungstate of ammonia, hyposulphite ofammonia, sulphate of s0da,caustic lime, chalk, alum', carbonate of soda,and oil in about the propori745 tungstate of ammonia, hyposulphite ofammonia, sulphateot soda, caustic lime, chalk,

.uid-in about the proportions specified.

In testimony that I claim-the foregoing as my own I have hereuntoaflixed my signature in presence of two witnesses.

' ROBERT RUDOLPH GRAF.

J No.- '1. MADDOX, i Tnos. W. MoRsE.

